<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>

<p class="p1">这是顶部线</p>
<p class="p2">这是删除线</p>
<p class="p3">这是下划线</p>

</body>
</html>